| Abbreviation | Definition |
|---|---|
| RAT | Recovery Assistance Team |
| RAT | Recruit At Training |
| RAT | Recruitment Assessment Team |
| RAT | Recruits At Training |
| RAT | Remove All Targets |
| RATELO | Radiotelephone Operator |
| RATSCAT | Radar Target Scatter |
| RATT | Radio Amplified Telegraphic Transmission |
| RATT | Radio Teletype |
| RATT | Responsive Awareness Tactical Training |
| RAU | Radio Access Unit |
| RAVAF | Royal Australian Virtual Air Force |
| RAVC | Royal Army Veterinary Corps |
| RAW | Real American Warrior |
| RAW | Reduction of Administrative Workload |
| RAW | Repertoire of Aquatic Warfare |
| RAW | Research Analysis Wing |
| RAW | Research and Analysis Wing |
| RAWS | Ranger Antitank Weapons System |
| RB | Review Board |